ASP.NET

Re: change forecolor of a label in gridview [modified]

15-Mar-10 9:27

Hello -
I want to change the forecolor of a label in a gridview I have, depending on the text in that label.
I can't access the label by the ID in the code-behind to get the properties.
The label is part of templatefield:

<div>
<asp:Label ID="lblFirstName" runat="server" Text='<%#Server.HtmlEncode(Eval("FirstName").ToString())%>'></asp:Label>
</div>

Thx, Laziale

modified on Monday, March 15, 2010 3:54 PM

Brij15-Mar-10 9:35

15-Mar-10 9:35

You wont get the label just by ID.To change the color, Just find the label in RowDataBound event of gridview and change the style there.
Find the label as

Label lblFirstName= (Label)e.Item.FindControl("lblFirstName");

put this RowDataBound event and modify the style as per your requirement.

Cheers!!
Brij

modified on Tuesday, March 16, 2010 12:54 AM

laziale15-Mar-10 9:47

15-Mar-10 9:47

can you give me some example how I can do ItemDataBound event?

Thanks for your help

Abhijit Jana15-Mar-10 10:02

15-Mar-10 10:02

laziale wrote:
can you give me some example how I can do ItemDataBound event?

I guess this should be RowDataBound. Not ItemDataBound !

Please check the answer that I have posted.

Thanks !

Cheers !
Abhijit
Codeproject MVP

Sandeep Mewara15-Mar-10 10:11

Sandeep Mewara

15-Mar-10 10:11

lets compromise on:
For Gridview its RowDataBound and for DataGrid its ItemDataBound! Smile | :)

Abhijit Jana15-Mar-10 10:14

15-Mar-10 10:14

I don't know if he has made some changes in his original post or not. It may be because Brij asked him to use ItemDataBound
Laugh | :laugh:

Cheers !
Abhijit
Codeproject MVP

laziale15-Mar-10 11:00

15-Mar-10 11:00

I just removed the
<templatefield> and <itemtemplate> tags because of some formatting issue of the site Smile | :)

Brij15-Mar-10 18:21

15-Mar-10 18:21

There are many data controls in asp.net and and have the different event names .for the same cause Was just a typo Smile | :)

Cheers!!
Brij

Abhijit Jana15-Mar-10 9:51

15-Mar-10 9:51

Please Correct the formatting of your post. Its breaking the page !

Cheers !
Abhijit
Codeproject MVP

Abhijit Jana15-Mar-10 10:01

15-Mar-10 10:01

Try with this :

You need to do this in RowDataBound Event of GridView.

void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
     
      Label lblFirstName= (Label)e.Item.FindControl("lblFirstName");
       if(lblFirstName.Text == "MyText")
             lblFirstName.ForColor=mycolor;
  
    }
}

Cheers !
Abhijit
Codeproject MVP

laziale15-Mar-10 11:06

15-Mar-10 11:06

Thanks for all your help.
I have one question, since I am trying to figure out the color of the label in the page_load event, is there anyway how I can assign the color depending from the text in that label?

Thx, Laziale

Abhijit Jana15-Mar-10 11:17

15-Mar-10 11:17

laziale wrote:
since I am trying to figure out the color of the label in the page_load event, is there anyway how I can assign the color depending from the text in that label?

Why you are trying out in Page_Laod. If you want to check for each and every row of gridview, you need to check it in RowDataBound Event only.

Cheers !
Abhijit
Codeproject MVP

laziale15-Mar-10 11:35

15-Mar-10 11:35

cause I want to display the proper color before the site is rendered on the screen. Is there a way how I can trigger that event in the Page_Load?

Thanks, Laziale

FyreWyrm15-Mar-10 15:39

FyreWyrm

15-Mar-10 15:39

Do you understand the page life cycle? Read about it here[^].

In your page load event you want to set the DataSource property of your grid and call DataBind. Hopefully in your init method you setup an item data bound event handler. When DataBind is called, for each row being added to the gridview your data bound event handler will be called. There you set your colors. After all of that is done, Render gets called for the page which generates all the HTML from your page and code which gets sent to your user's browser.

Don't blame me. I voted for Chuck Norris.

Brij15-Mar-10 18:27

15-Mar-10 18:27

For changing the color,just change the color in rowdatabound only.It'll suffice your purpose.
After pageload,you must have assigning some datasource.then, your rowdatabound event will be called for each row.In this event,you can modify the color based on the text. After it page will render and your changes will refelct on the screen.

So you dont need to do this at pageload.

Cheers!!
Brij

laziale16-Mar-10 3:14

16-Mar-10 3:14

nothing is happening with that one, I have the event set but its not triggered at all. The page loads without triggering that event.
But thanks for your help anyway.
Laziale

Abhijit Jana16-Mar-10 3:30

16-Mar-10 3:30

laziale wrote:
nothing is happening with that one, I have the event set but its not triggered at all.

Did you specified the event with gridview in aspx page ?

Cheers !
Abhijit
Codeproject MVP

laziale16-Mar-10 3:59

16-Mar-10 3:59

ok, there were two events for the same thing, that why it wasn't triggered. Now its triggered, but for some reason when I am stepping in to the code the label property doesn't get the text. Its left empty.
Here is the code:

void gvOrderProductVariants_RowDataBound(object sender, GridViewRowEventArgs e)
   {
       if (e.Row.RowType == DataControlRowType.DataRow)
       {
           Label lblFirstName= (Label)e.Row.FindControl("lblFirstName");
           if (lblFirstame.Text.Contains("John"))
               lblFirstName.ForeColor = System.Drawing.Color.Red;
       }


   }

Please tell me if I am doing something wrong.
Thx, Laziale

carlecomm15-Mar-10 16:35

carlecomm

15-Mar-10 16:35

hi,

Here is an example:

gridview_OnDataBound(){
Label label1 = e.Item.FindControl("lable1") as Label;
Label label2 = e.Item.FindControl("lable2") as Label;
if(lable1.Text == "1") {
label2.ForeColor = "red";
}else if(lable1.Text == "2"){
label2.ForeColor = "blue";
}
}

Hope it helps Smile | :)

modified 27-May-14 4:49am.

laziale16-Mar-10 3:17

16-Mar-10 3:17

I can't get to the 'e' argument since the databound event is using EventArgs. Frown | :(

Thanks for your help though

BulletedList control

hotthoughtguy15-Mar-10 8:03

hotthoughtguy

15-Mar-10 8:03

<asp:SqlDataSource ID ="myid" ConnectionString = "server = .\sqlexpress; integrated security = True; database = northwind;"
SelectCommand = "select LastName from employees " runat = "server" />
<asp:BulletedList runat="server" DataSourceID = "myid"/>

and its output

* System.Data.DataRowView
* System.Data.DataRowView
* System.Data.DataRowView
* System.Data.DataRowView
* System.Data.DataRowView
* System.Data.DataRowView
* System.Data.DataRowView
* System.Data.DataRowView
* System.Data.DataRowView
* System.Data.DataRowView
* System.Data.DataRowView
* System.Data.DataRowView

i want it to be LastName not its default ToString();

Re: BulletedList control

Sandeep Mewara15-Mar-10 9:23

Sandeep Mewara

15-Mar-10 9:23

You are missing DataTextField binding.

Specify the control's DataSourceID property. Specify at the very least the required DataTextField. The value of each record in this field will then be displayed as the text of each item in the list.

So, you need to do:

<asp:BulletedList runat="server" DataSourceID = "myid" DataTextField="LastName" />

Re: BulletedList control

Brij15-Mar-10 9:31